Hex #554f5f or rgb(85,79,95) in RGB space is the tint of purple. It has hue angle of 262.50 degrees, value = 37 and saturation = 17. #554f5f can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of magenta, 2 drops of cyan, 4 drops of black.
Nearest safe hex - #666666. Below you can see the block with #554f5f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #554f5f to the mixer and play with it.